Table 2.

Interrater reliability of 2D:4D measurements

Method	Observer 1	Observer 2	∆	TEM (%)	SEE	ICC (95% CI)	Classification
	mean 2D:4D (SD)	mean 2D:4D (SD)
X-ray	0.905 (0.020)	0.904 (0.020)	0.001	0.007 (0.9%)	0.010	0.94 (0.91-0.96)	excellent
DXA	0.908 (0.019)	0.907 (0.020)	0.001	0.009 (1.2%)	0.010	0.90 (0.86-0.94)	excellent

Note: Interrater reliability for both observers. = difference; TEM = technical error of measurement, absolut and in % of the mean. SEE = standard error of estimate; ICC = intraclass correlation coefficients; CI = confidence intervall; classification according to Rosner (2011). ICCs < 0.7 were considered non-acceptable, 0.71 < ICCs < 0.79 were acceptable, 0.80 < ICCs < 0.89 were very good and ICCs >0.90 were excellent.